impair
4 synonyms and 3 antonyms for impair, grouped by meaning and by how common each one is.
Verb — To make something weaker or worse.
Synonyms
Less common
Still standard English, but they carry more weight.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
Antonyms
Etymology
Came into English via Middle English impairen, empeiren, from Old French empeirier, from Early Medieval Latin impeiōrāre, from in- plus Late Latin peiōrāre ("worsen"), from peiōrem ("worse"), the comparative of malus ("bad").
Full origin of impair →